LS1046A SGMII网口无PHY芯片的配置

• 转载地址：https://www.pianshen.com/article/14731854606/

• LS1046支持SGMII网口，DEMO板设计SGMII+PHY+RJ45的方式出网口，MIDO接口访问PHY芯片，会设置PHY芯片的MIDO地址。

• 而实际在板间或者CPU之间，是直接通过SGMII对接通讯的，没有PHY芯片，则不要配置PHY芯片MIDO地址。必须配置SGMII网口的PHY为FIXED-PHY，并且关闭SGMII内部PHY自协商模式，方可通讯。

• 修改设备树配置文件 fsl-ls1046a-frwy.dts
  &fman0 {

  /*eth0 FM3 RGMII 调试网口 */
  ethernet@e4000 {
  phy-handle = <&rgmii_phy1>;
  phy-connection-type = “rgmii”;
  };

  /eth1 FM6 SGMII 对应VP0/
  ethernet@ea000 {
  fixed-link = <0 1 1000 0 0>;
  phy-connection-type = “sgmii”;
  };

  /eth2 FM2 SGMII 对应VP1/
  ethernet@e2000 {
  fixed-link = <0 1 1000 0 0>;
  phy-connection-type = “sgmii”;
  };

  /eth3 FM5 SGMII 对应VP2/
  ethernet@e8000 {
  fixed-link = <0 1 1000 0 0>;
  phy-connection-type = “sgmii”;
  };

  /eth4 FM9 SGMII 对应VP3/
  ethernet@f0000 {
  fixed-link = <0 1 1000 0 0>;
  phy-connection-type = “sgmii”;
  };

  /eth5 FM10 SGMII 主备VP网口/
  ethernet@f2000 {
  fixed-link = <0 1 1000 0 0>;
  phy-connection-type = “sgmii”;
  };

  mdio@fc000 {
  rgmii_phy1: ethernet-phy@1 {
  reg = <0x1>;
  };
  };
  };

• 关闭SGMII自协商